A misdiagnosis case generally centers on a healthcare provider’s diagnostic decision-making. That might mean a provider identified the wrong condition, missed a serious diagnosis, failed to recognize symptoms that should have triggered additional testing, or did not appropriately follow up when test results were abnormal. In Massachusetts, as in other states, the legal question is whether the care fell below what a reasonably careful provider would have done under similar circumstances.
Misdiagnosis claims often arise in common care settings across the Commonwealth, including primary care offices, urgent care centers, emergency departments, specialty clinics, and hospital systems. Diagnostic errors can also show up in how information is communicated and documented, such as when imaging findings are overlooked, lab results are not acted on, or discharge instructions do not reflect the patient’s real risk.
It is also important to understand that a misdiagnosis claim is not automatically created by a bad outcome. Medicine can be complex, and symptoms sometimes overlap across multiple conditions. The distinction for the law is whether the diagnostic process was reasonable based on the information available at the time and whether the error caused injuries that would not have occurred—or would have been less severe—without the delay or mistake.


